Fixed lexer changes made in #3434

Signed-off-by: Ivan Kozlovic <ivan@synadia.com>

conf/lex.go

@@ -1009,17 +1009,12 @@ func lexConvenientNumber(lx *lexer) stateFn {
 	case r == 'b' || r == 'B' || r == 'i' || r == 'I':
 		return lexConvenientNumber
 	}
+	lx.backup()
 	if isNL(r) || r == eof || r == mapEnd || r == optValTerm || r == mapValTerm || isWhitespace(r) || unicode.IsDigit(r) {
-		lx.backup()
 		lx.emit(itemInteger)
 		return lx.pop()
 	}
-	// This is not a number, so we have to backup to the start and consider
-	// this to be a string
-	pos, start := lx.pos, lx.start
-	for i := pos; i > start; i-- {
-		lx.backup()
-	}
+	// This is not a number, so treat it as a string.
 	lx.stringStateFn = lexString
 	return lexString
 }

conf/lex_test.go

@@ -330,6 +330,16 @@ func TestConvenientIntegerValues(t *testing.T) {
 	}
 	lx = lex("foo = 3Mbs,")
 	expect(t, lx, expectedItems)
+
+	expectedItems = []item{
+		{itemKey, "foo", 1, 0},
+		{itemInteger, "4Gb", 1, 6},
+		{itemKey, "bar", 1, 11},
+		{itemString, "5Gø", 1, 17},
+		{itemEOF, "", 1, 0},
+	}
+	lx = lex("foo = 4Gb, bar = 5Gø")
+	expect(t, lx, expectedItems)
 }
 
 func TestSimpleKeyFloatValues(t *testing.T) {